中文摘要：

春季由于流域气温突升或在开河期有集中降雨,导致河道流量剧增、水位迅涨等情况发生,由此形成较大的涌水波向下游传播,作用于下游的冰盖,并导致冰盖破裂。基于弹性地基梁理论,针对涌水波对下游冰盖的作用机理及冰缝形成进行了研究,尝试性采用分层计算的方法处理冰盖的弹性模量,计算结果表明冰盖的破冰波长和裂缝位置范围略有减少,获得了更符合工程实际的理论解析解。

英文摘要：

A sudden Temperature rise or a short-period concentrated rainfall as ice cover is breaking up in spring, always causes a dramatic increase in river flow and a water level rise that is very fast so as to create a large bore. This bore travels fast downstream, acts on the downstream ice sheet, and causes the occurrence of ice breakup there. This paper studies the mechanism of bore-ice sheet interaction and the ice cracks formation by applying an elastic foundation theory and using a laminated elastic modulus for calculation of the ice breakup. The analytical calculations show that the wavelength and scope of the cracked ice sheet are slightly smaller but closer to the real situations.